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Why Can't California Build? What Hong Kong, Tokyo and Taipei Do Differently
Tokyo outbuilds all of California on the same shaky ground. It's not engineering. It's who gets to say no.
 • EngineeringUncle
A battery that never runs flat
A fuel cell makes electricity without burning anything: it's a battery you never have to recharge, as long as you keep feeding it. Here's how the…
 • EngineeringUncle
How Does Starlink Direct to Cell Work? (And How AST SpaceMobile Differs)
Your phone was built to reach a tower a few kilometres away, not a satellite 500 km up. Here's how SpaceX makes it work anyway, how AST SpaceMobile…
 • EngineeringUncle
How Does TSMC Make Chips? Inside a Leading-Edge Foundry
A thousand steps, three months and up to 100 layers, all on a silicon disc the size of a dinner plate. How the world's most important factory works, and…
 • EngineeringUncle
How Does Tokyo Stop Floods? Inside the G-Cans Underground Temple
Beneath the rice fields north of Tokyo sits a cathedral of concrete, a 6.3 km tunnel and four jet-engine pumps that can move 200 tonnes of water a…
 • EngineeringUncle
HVDC Circuit Breakers: What They Are and Why DC Is Hard to Switch Off
AC current passes through zero a hundred times a second. DC never does. That is why a high-voltage DC breaker has to make its own zero, and why real DC…
 • EngineeringUncle
Why don't we build big dams anymore?
A dam is not a wall with a pretty lake. It is geology, people, downstream countries, permits and a decade of concrete. Ethiopia, China and the West each…
 • EngineeringUncle
Five drops per AI prompt. Millions of gallons per campus.
Some use almost none. Some drink millions of gallons a day. The difference is one engineering choice: evaporate the heat away, or pay for it in…
 • EngineeringUncle

September 2026

How do you cool a 130 kW rack?
AI racks now dump more heat than room air can carry. So the water comes to the chip: cold plates, a pumped loop, and a box called a CDU.
 • EngineeringUncle
How do gas plants hit 60% efficiency?
One fire, two machines. The jet-engine half makes power, the leftover heat boils steam and makes more. Here is how that beats 60%, and why real plants…
 • EngineeringUncle
Why hydrogen pipes exist, and why the town grid cannot just switch
Not water. Not a normal gas main with a new sticker. Why anyone builds hydrogen pipes, what the smallest molecule does to old steel, and why the town…
 • EngineeringUncle
How Base Isolation Protects Buildings From Earthquakes
The building sits on giant rubber or sliding pads. The ground thrashes. The rooms above move much less. Japan and Taiwan built this into hospitals and…
 • EngineeringUncle
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